Harder the second time around: Jessica said her second pregnancy was 'awful' and that she had been 'vomiting'

That was quick: The star fell pregnant with her second child less than a year after having her first

Jimmy joked when greeting her that 'It's time to have this baby already,' to which Jessica laughingly said, 'I know, I can't believe I'm pregnant again!'

But this time around, being pregnant is more of a challenge, said Jessica.

'It's a totally different pregnancy. I just feel awful, I've been vomiting,' said the star candidly.

She then cracked the wiener joke, after which she brought her hand to her mouth in shock at her accidental slip.

'I can't believe I just did that, that was not planned,' Jessica said good-naturedly. Later she said, 'I just did it so crude, I feel awful!'

It's been reported that Jessica and her fiance plan to name their child Ace. When Jimmy addressed the rumours, Jessica didn't answer him directly, stating 'Well let's hope it's a boy!'

Kimmel also asked the fashion mogul whether she planned on getting married soon.

'I keep planning on getting married but I keep getting knocked up,' quipped the star.

'Maybe
I should go back to when I was younger - I was a virgin before I was
married, so maybe I should just completely reverse and just stop having
sex all together until Eric and I actually say "I do."'

Jimmy asked what Jessica's father Joe Simpson, who is an ordained minister, said when his daughter got pregnant out of wedlock.

Jessica said when she told him she was pregnant the first time, he said 'Well what are we going to do?' And the second time she fell pregnant, Joe was more resigned, merely stating, 'Oh honey.'

When asked whether she and Eric plan on having more kids, Jessica stated:

'I really don't want to be pregnant again because this pregnancy is really rocking my world right now.'

Jimmy also mentioned Jessica's best friend Cacee Cobb, who is pregnant and due around the same time as Jessica.

When asked if the two had planned it, Jessica replied, 'Well it's definitely something we would love to have happened. We want our babies to be best friends, 'cause we are.

'So now we're going to force them to go to school together, force them to eat sandwiches together.'

'Hopefully it works out, we would be heartbroken,' the star said, laughing.

Could have said it better: Jessica said about her announcement, 'I just did it so crude, I feel awful!'

Jessica was promoting her upcoming show Fashion Star, which premieres on Friday on NBC.

The singer is a celebrity judge and mentor to aspiring clothing designers on the series.

'I'm pretty confident in my brand and I know what women in America like to buy,' said Jessica. 'So I feel I have a lot to offer these contestants who are coming in every week and trying to design for the everyday woman.'

Jessica was wearing a black lace dress from her new maternity line Destination Maternity.

'The good thing is when you're pregnant you can feel sexy,' the star said about her new collection. 'You don't have to have all these frumpy clothes.'

The
height of opulence: Jessica was seen wearing a fur
coat and scarlet lipstick as she left her interview with the talk show host

She then laughed and said she was wearing black because of its 'slimming' qualities.

'People like to talk about my weight,' she said.

'This time I'm not going to gain as much [weight],' said the star, who gained more than 50lbs during her last pregnancy.

'I didn't know you could actually pack on that many pounds so quick!' added the blonde.

She then said she thought a lot of the weight was water, and that it would come 'gushing out' when she gave birth. But only once she had her baby did she realise it was 'layers of fat.'

'I had to work off all those brownies I ate,' she laughed.

Jessica harkened back to another era in an opulent fur coat and
scarlet red lips as she left the interview.

She was snapped in the
backseat of a car looking like a larger-than-life doyenne of showbiz as
her expensive coat appeared to surround her.

Let's get going: The singer was seen chatting with a woman in the front seat of her car as they left the studio lot

VIP treatment: Security surrounded Jessica's car after he interview with the popular late night talk show host

The singer wore her platinum blonde hair in an elegant half updo, and highlighted her full lips with glossy red lipstick.

The mother-of-one was seen chatting with a blonde woman in the front seat as they drove away from the talk show host's studio.

Jessica appears to have reconciled with her father Joe Simpson, who was pictured earlier in the day arriving at the studio to support his daughter.

They were believed to have been estranged following news of her parents' split in October.

But Jessica and her father were pictured smiling and chatting at the wedding of her best friend Cacee's wedding in December.

Cool in blue: Jessica's father Joe Simpson arrived at the studio in support of his daughter after the two reconciled in December from a fallout